I think either kate is pregnant or she is not. If not then the whole charade is a plan to get sympathy from everyone and divert attention away from Prince Charles association with Jimmy Savile.
She will probably "miscarry" to get extra sympathy.
As far as nurse is concerned, I think one of 3 things has happened,
1. she has killed herself thru the total humuliation of the situation.
2. She found out that kate was not really pregnant and contacted Max Cliffford to find out what she should do about it. Max was immediately arrested on Thursday, forced to keep silent and nurse was executed Friday morning.
3. They whole thing is a setup to create a public outcry against Rupert Murdoch who just happens to own the Australian radio station thru Fox network. This will cause the new rules on press gagging to be forced through on a wave of public opinion caused by the death of the poor nurse and Kate's tragic miscarrage.